Why does Chelsea FC have a 3 on their jersey? - Quora
Opinion: Could Trivago be Chelsea's next shirt sponsor?
Chelsea in talks with Atletico's jersey sponsor in ongoing search - World Soccer Talk
Why does Chelsea's new kit not have a shirt sponsor? Blues wear plain kit against Luton after Premier League veto
Chelsea to face Liverpool without shirt sponsor
Chelsea back out of Stake.com deal & remain without shirt sponsor
Chelsea refused permission to circumvent Premier League rules for shirt sponsorship - We Ain't Got No History
Chelsea 2023-24 kit: New home, away and third jerseys, release dates & prices
New Chelsea kit 2015/16: Blues unveil first home strip since signing £40m-a-year deal with Yokohama Rubber, London Evening Standard